Isomorphic alternation of generations is found in

Options

A. Oedogonium
B. Chara
C. Ectocarpus
D. Vaucheria.

Answer

To answer the question "Isomorphic alternation of generations is found in," we will follow these steps:

### Step 1: Understand the Concept of Alternation of Generations
- Alternation of generations refers to the life cycle of plants and some algae where there are two distinct phases: the haploid phase (gametophyte) and the diploid phase (sporophyte).
- In isomorphic alternation, both phases are morphologically similar or identical.

**Hint:** Recall that "haploid" refers to one set of chromosomes, while "diploid" refers to two sets.

### Step 2: Differentiate Between Isomorphic and Heteromorphic Alternation
- In isomorphic alternation, the sporophyte and gametophyte are similar in appearance.
- In heteromorphic alternation, the sporophyte and gametophyte are different in morphology. An example of heteromorphic alternation is found in mosses.

**Hint:** Think about whether the two phases look the same (isomorphic) or different (heteromorphic).

### Step 3: Identify Examples of Isomorphic Alternation
- An example of isomorphic alternation of generations is found in certain algae.
- Specifically, the genus **Ectocarpus**, which is a filamentous brown alga, exhibits isomorphic alternation of generations.

**Hint:** Consider the types of organisms that exhibit this kind of life cycle, particularly in the algal group.

### Step 4: Confirm the Answer
- Based on the information gathered, the correct answer to the question is that isomorphic alternation of generations is found in **Ectocarpus**.

**Hint:** Remember that the question asks for a specific organism, so focus on the names of organisms rather than general categories.

### Final Answer:
Isomorphic alternation of generations is found in **Ectocarpus**.